[PATCH v2 11/14] [media] ddbridge: fix impossible condition warning

[Daniel Scheller]

From: Daniel Scheller <d.schel...@gmx.net>

Smatch and gcc complained:

  drivers/media/pci/ddbridge/ddbridge-core.c:3491 bpsnr_show() warn: impossible 
condition '(snr[0] == 255) => ((-128)-127 == 255)'

  drivers/media/pci/ddbridge/ddbridge-core.c: In function ‘bpsnr_show’:
  drivers/media/pci/ddbridge/ddbridge-core.c:3491:13: warning: comparison is 
always false due to limited range of data type [-Wtype-limits]

Fix this by changing the type of snr to unsigned char.

Cc: Ralph Metzler <r...@metzlerbros.de>
Signed-off-by: Daniel Scheller <d.schel...@gmx.net>
Tested-by: Richard Scobie <r.sco...@clear.net.nz>
Tested-by: Jasmin Jessich <jas...@anw.at>
Tested-by: Dietmar Spingler <d_sping...@freenet.de>
Tested-by: Manfred Knick <manfred.kn...@t-online.de>
---
 drivers/media/pci/ddbridge/ddbridge-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/pci/ddbridge/ddbridge-core.c 
b/drivers/media/pci/ddbridge/ddbridge-core.c
index 1ffcf23c63ed..ace06fcdd0cf 100644
--- a/drivers/media/pci/ddbridge/ddbridge-core.c
+++ b/drivers/media/pci/ddbridge/ddbridge-core.c
@@ -3251,7 +3251,7 @@ static ssize_t bpsnr_show(struct device *device,
                         struct device_attribute *attr, char *buf)
 {
        struct ddb *dev = dev_get_drvdata(device);
-       char snr[32];
+       unsigned char snr[32];
 
        if (!dev->i2c_num)
                return 0;
-- 
2.13.0